Drop support for Python 2.6

Commit 40d4e496 is not reverted
because Python 3 will also require to keep the distinction between
blob and text.

README.rst

@@ -52,7 +52,7 @@ easily scalable to tens of thousand of nodes.
 Requirements
 ============
 
-- Python 2.6 or 2.7
+- Python 2.7
 - OpenSSL binary and development libraries
 - OpenVPN >= 2.4
 - Babel_ (with Nexedi patches)

re6st/cli/node.py

@@ -166,7 +166,7 @@ def main():
         config.disable_proto = ()
     if config.default:
         # Make sure we won't tunnel over re6st.
-        config.disable_proto = tuple(set(('tcp6', 'udp6')).union(
+        config.disable_proto = tuple({'tcp6', 'udp6'}.union(
             config.disable_proto))
     address = []
     server_tunnels = {}

re6st/ctl.py

@@ -262,7 +262,7 @@ class Babel(object):
 
     def handle_dump(self, interfaces, neighbours, xroutes, routes):
         # neighbours = {neigh_prefix: (neighbour, {dst_prefix: route})}
-        n = dict(((n.address, n.ifindex), (n, {})) for n in neighbours)
+        n = {(n.address, n.ifindex): (n, {}) for n in neighbours}
         unidentified = set(n)
         self.neighbours = neighbours = {}
         a = len(self.network)
@@ -307,7 +307,7 @@ class Babel(object):
                 neighbours[None] = None, routes
                 logging.trace("Routes via unidentified neighbours. %r",
                               neighbours)
-        self.interfaces = dict((i.index, name) for i, name in interfaces)
+        self.interfaces = {i.index: name for i, name in interfaces}
         self.handler.babel_dump()
 
     def handle_set_cost_multiplier(self, flags):

re6st/registry.py

@@ -213,8 +213,7 @@ class RegistryServer(object):
         not_after = None
         old = time.time() - GRACE_PERIOD
         q =  self.db.execute
-        with self.lock:
-          with self.db:
+        with self.lock, self.db:
             q("BEGIN")
             for token, x in q("SELECT token, date FROM token"):
                 if x <= old:
@@ -539,8 +538,7 @@ class RegistryServer(object):
 
     @rpc_private
     def revoke(self, cn_or_serial):
-        with self.lock:
-          with self.db:
+        with self.lock, self.db:
             q = self.db.execute
             try:
                 serial = int(cn_or_serial)
@@ -570,8 +568,7 @@ class RegistryServer(object):
 
     @rpc_private
     def updateHMAC(self):
-        with self.lock:
-          with self.db:
+        with self.lock, self.db:
             hmac = [self.getConfig(BABEL_HMAC[i], None) for i in (0,1,2)]
             if hmac[0]:
                 if hmac[1]:
@@ -595,8 +592,7 @@ class RegistryServer(object):
 
     @rpc_private
     def getNodePrefix(self, email):
-        with self.lock:
-          with self.db:
+        with self.lock, self.db:
             try:
                 cert, = self.db.execute("SELECT cert FROM cert WHERE email = ?",
                                         (email,)).next()
@@ -636,10 +632,10 @@ class RegistryServer(object):
     def versions(self):
         with self.peers_lock:
             self.request_dump()
-            peers = set(prefix
+            peers = {prefix
                 for neigh_routes in self.ctl.neighbours.itervalues()
                 for prefix in neigh_routes[1]
-                if prefix)
+                if prefix}
         peers.add(self.prefix)
         peer_dict = {}
         s = self.sock,
@@ -686,7 +682,7 @@ class RegistryServer(object):
                     self.sendto(utils.binFromSubnet(peers.popleft()), 5)
                 elif not r:
                     break
-        return json.dumps(dict((k, list(v)) for k, v in graph.iteritems()))
+        return json.dumps({k: list(v) for k, v in graph.iteritems()})
 
 
 class RegistryClient(object):

re6st/tunnel.py

@@ -239,9 +239,9 @@ class BaseTunnelManager(object):
         elif cache.same_country:
             sys.exit("Can not respect 'same_country' network configuration"
                      " (GEOIP2_MMDB not set)")
-        self._address = dict((family, utils.dump_address(address))
+        self._address = {family: utils.dump_address(address)
                          for family, address in address_dict.iteritems()
-                             if address)
+                         if address}
 
         self.sock = socket.socket(socket.AF_INET6,
             socket.SOCK_DGRAM | socket.SOCK_CLOEXEC)
@@ -903,10 +903,10 @@ class TunnelManager(BaseTunnelManager):
             logging.debug('Analyze routes ...')
             neighbours = self.ctl.neighbours
             # Collect all nodes known by Babel
-            peers = set(prefix
+            peers = {prefix
                 for neigh_routes in neighbours.itervalues()
                 for prefix in neigh_routes[1]
-                if prefix)
+                if prefix}
             # Keep only distant peers.
             distant_peers[:] = peers.difference(neighbours)
             distant_peers.sort(key=self._newTunnelScore)

setup.py

@@ -51,7 +51,6 @@ Environment :: Console
 License :: OSI Approved :: GNU General Public License (GPL)
 Natural Language :: English
 Operating System :: POSIX :: Linux
-Programming Language :: Python :: 2.6
 Programming Language :: Python :: 2.7
 Topic :: Internet
 Topic :: System :: Networking